04243

Phosphate de potassium monobasic

meets analytical specification of Ph. Eur., NF, E340, anhydrous, 98-100.5% (calc. to the dried substance)

• Synonyme(s) : Dihydrogénophosphate de potassium, Phosphate de potassium prim., Phosphate monopotassique
• Formule linéaire : KH₂PO₄
• Numéro CAS: 7778-77-0
• Poids moléculaire : 136.09
• Numéro CE : 231-913-4
• Numéro MDL: MFCD00011401
• Code UNSPSC : 12161700
• eCl@ss : 38070209
• ID de substance PubChem : 329747897
• Nomenclature NACRES : NA.25

Propriétés

• Qualité: anhydrous; meets analytical specification of Ph. Eur., NF, E340
• Niveau de qualité: 200
• Essai: 98-100.5% (calc. to the dried substance)
• Forme: crystalline
• Impuretés: org. volatile impurities, complies (GC); residual solvents, complies; ≤0.001% heavy metals (as Pb); ≤0.04% KMnO₄ red. matter (as O); ≤0.2% in water insoluble matters
• Perte: ≤1% loss on drying, 130 °C
• pH: 4.2-4.5 (20 °C, 5%)
• pKa (25 °C): (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
• Pf: 252.6 °C (lit.)
• Solubilité: H₂O: soluble 4.5 parts; alcohol: insoluble
• Densité: 2.338 g/mL at 25 °C (lit.)
• Traces d'anions: chloride (Cl^-): ≤10 mg/kg; fluoride (F^-): ≤10 mg/kg; sulfate (SO₄^2-): ≤200 mg/kg
• Traces de cations: As: ≤2 mg/kg; Cd: ≤1 mg/kg; Cu: ≤20 mg/kg; Fe: ≤10 mg/kg; Hg: ≤1 mg/kg; Na: ≤1000 mg/kg; Pb: ≤4 mg/kg; Zn: ≤20 mg/kg
• Adéquation: complies for appearance of solution
• Chaîne SMILES: [K+].OP(O)([O-])=O; [K+].OP(O)([O-])=O
• InChI: 1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1
• Clé InChI: GNSKLFRGEWLPPA-UHFFFAOYSA-M

Description

Application

Potassium phosphate monobasic was used for separating tobacco protein by using aqueous two-phase extraction.[1]

Actions biochimiques/physiologiques

Potassium phosphate monobasic also referred to as monopotassium phosphate or potassium dihydrogen phosphate is a soluble salt of potassium that serves as a buffering agent. It enhances the solubility of calcium and phosphorus in amino acid plus dextrose solutions and hence assists in improving the mineral balance of parenterally fed low birth weight infants.[2]

Notes préparatoires

Potassium phosphate monobasic dissolves in 4.5 (approx.) parts of water to yield a solution. It is practically insoluble in alcohol.

Informations sur la sécurité

• Code de la classe de stockage: 13 - Non Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 1
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable